近40年中国植物物候对气候变化的响应研究

Changes of Plant Phenological Period and Its Response to Climate Change for the last 40 years in China

根据中国科学院物候观测网络中 2 6个观测站点的物候资料 ,分析了近 40年我国木本植物物候变化及其对气候变化的响应关系 ,并建立了不同年代物候期与地理位置之间的关系模式 ,分析了当前气候增暖背景下物候期地理分布规律变化对气候变化的响应关系。结果表明 :温度上升 ,我国的木本植物春季物候期提前。 2 0世纪 80年代以后 ,东北、华北及长江下游等地区的物候期提前 ,西南东部、长江中游等地区的物候期推迟 ,同时物候期随纬度变化的幅度减小。

Based on the plant phenological data of 26 stations from 1963 to 1996, observed by the phenological observation network of the Chinese Academy of Sciences, changes of plant phenological period and its response to climate change were studied. The models for relationship between phenological periods in every decade and geographical location were constructed. The response of the geographical distribution of phenological period to climate change was analyzed. The results showed that the phenological periods of ligneous plant occurred earlier as the temperature in spring rises; In the Northeastern China, the North of China, and the regions of lower reaches of the Changjiang River, the plant phenological periods were earlier since 1980's. In the eastern part of the Southwest China and the regions of middle reaches of the Changjiang River, the plant phenological periods delayed as the temperature declined; Changes of phenological periods became smaller with the increasing of latitude.